Meanwhile, The X Factor 2018 winner's single will also be a duet, it's claimed.

The three finalists have all recorded songs with some familiar names to be released to download and stream if they win the show.

Dalton has recorded a song with 2012 X Factor winner James Arthur, Scarlett Lee's potential winner's track is with 2006 X Factor champ Leona Lewis and Anthony Russell has been in the studio with Kaiser Chiefs' frontman Ricky Wilson.

A source explained: "The X Factor no longer has a monopoly on the Christmas No1 like in the early days, so this exciting spin on the winner’s single will ensure it is in the running. James, Leona and the Kaiser Chiefs are friends of the show and were happy to lend their vocals to the winner’s singles, even though only one of the records will see the light of day.

“While Dalton, Anthony or Scarlett have to share the glory, the chance to collaborate with one of the country’s biggest acts on their first ever release is an added perk.”

Bookies currently have The X Factor winner as the third favourite to score this year's Christmas number one single.

Currently a staggering NINE bands or artists are priced 10/1 or shorter.

Ariana Grande continues to head the betting at 2/1, but odds have been slashed on Ava Max over the last few days following a flurry of bets and she's now 4/1 second-favourite (from 25/1 last week).

Behind X Factor at odds of 8/1 is last year's Christmas number one, Ed Sheeran, who is 10/1 to top the charts for a second year running - a price he shares with Elton John and Queen.

Alex Apati of Ladbrokes said: "With so many big names at the head of the market for Christmas number one, this could well be the most wide open race ever for top spot."

The X Factor final begins on Saturday, December 1 at 7:30PM on ITV.

Guest acts include Anne Marie, Take That, Chic, James Arthur, Ellie Goulding and George Ezra.